Robust microphone arrays using subband adaptive filters
Neo, W.H. Farhang-Boroujeny, B.
Neo, W.H.
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Abstract
A new adaptive beamformer which combines the idea of subband processing and the generalised sidelobe canceller structure is presented. The proposed subband beamformer has a blocking matrix that uses coefficient-constrained subband adaptive filters to limit target cancellation within an allowable range of direction of arrival. Simulations comparing the fullband and subband adaptive beamformers show that the subband beamformer has better performance than the fullband beamformer when the target and/or interfering signals are coloured. In reverberant environments, the proposed subband beamformer also performs better than its fullband counterpart.
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Source Title
IEE Proceedings: Vision, Image and Signal Processing
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Date
2002-02
DOI
10.1049/ip-vis:20020139
Type
Conference Paper